Adjustable pressure emulsor



June 19, 1934. E. M. FERNs ADJUSTABLE PRESSURE EMULSOR Filed Oct. 24, 1933 Patented June A1li), 1934 UNITED STATES PATENT OFFICE 1,963,549 ADJUSTABLE PRESSURE EMULSOR land Application October 24, 1933, Serial No. 695,059 In Great Britain July 14, 1932 4 Claims.

This invention relates to pressure emulsors for 'emulsifying a suspension of solids or semi-solids in a liquid of the kind wherein the mixture is forced by a plunger through a helical passage at `5 the discharge end of a barrel. The object of the present invention is to provide a variable area helical pass-age whereby the emulsor may be adjusted to give the best results, and different mixtures may be treated with equally successful results.

According to the invention, the suspension is forced through a helical space between the convolutions of a helical spring, enclosed in an annular chamber at one end of a force pump barrel.

The helical space so formed is adjustable in crosssectional area by adjusting the helical spring.

An embodiment of the invention is shown in the accompanying drawing, wherein:-

Figure 1 is a general outside view in elevation;

and

Figure 2 is a sectional elevation of the device (less support, feed container and handle) at rightangles to Figure 1.

The apparatus consists of a pump barrel or compression tube 1, in which a piston 2 can be moved up and down by means of a lever 3. The tube is connected with a stand 4 by means of a metal band 5. Leading into the tube is a feeding tube 6 which receives the mixture to be emulsified from a container 7. The piston 2 also serves as a valve for the inlet from tube 6 by closing it on" the downward stroke and opening it on the upward` stroke.

In the lower end of the barrel or compression tube lis formed or inserted a helical spring 8.

This spring is confined between an annular shoulder 10 projecting inwardly from the cylinder 1 and a screw cap l0 threaded on the end of the cylinder, the said screw cap having a pin 9 projecting into and closely fitting the central opening in the spring 8 whereby the helical space between the convolutions of the spring is closed at its inner side. By rotating the cap 10 in one direction the spring is compressed and the helical space is narrowed, while by rotating the cap 10 in the other direction the spring is permitted to expand and the helical space is widened. The screw-cap has exit apertures 11.

The way in which the apparatus is worked is as follows: the helical spring 8 is compressed by the cap and plunger 9, 10 as much as desirable to form an emulsion of the desired fineness. The piston 2 is then pressed downwards so that it closes the inlet 6, and the mixture is poured into ,55 the container 7. By raising the piston the inlet is opened and the lower part of the compression barrel 1 is lled with mixture, and by the pistons downward stroke the inlet is closed and the mixture is thereupon pressed out through the helical passage formed by the spring 8, the latter being enclosed between the barrels inner wall and the plunger 9. t

The inside of this helical passage-way may be knurled or otherwise roughened by knurling those two sides of the spring wire which forms the passage. The spring may in section be of any suitable shape, as square, rectangular or other- Wise.

When the emulsication -of the mixture is finished, it is an easy matter to clean the apparatus without taking it to pieces by loosening the screw cap 10 whereby the spring will expand and a free passage will be provided for rinsing.

I claimr- 1. A pressure emulsor comprising a pump barrel, a plunger therein, means for the supply of material to the pump barrel, means providing an abutment within the pump barrel near the discharge end thereof, an apertured cap threaded on theY discharge end of the pump barrel, a helical spring interposed between said abutment and said cap, said spring closely fitting the pump barrel, and means closing the central opening through the spring.

2. A pressure emulsor as set forth in claim 1 in which the means closing the central opening through the spring comprises a core piece extending inwardly from the screw cap.

3. A pressure emulsor as set forth in claim 1 in which the spring has roughened faces.

4. A pressure emulsor comprising a pump barrel, a plunger therein, means for the supply of material to the pump barrel, a helical spring and means cooperating therewith to provide a helical passageway at the discharge end of the pump barrel, and means for adjusting said spring to vary the depth of said passageway.

ETHEL MARY FERNS. 

